A missing worker died from an electric shock while sleeping next to his charging phone.

Puttawat Kamwan, 34, did not turn up to his shift for three days so worried colleagues visited his apartment in Samut Prakan province, Thailand on January 26 evening.

However, they found their friend collapsed and decomposing on the bed with his arm resting on the electronic device.

Footage shows the worker's bedroom with the charger and power cord lying next to his bed. Medics and police arrived to check on him and the room for evidence.

Colleague Pantatip Kanthong, 22, said: ‘We work at a jewellery shop. He was absent for three days and did not answer his phone.'

‘After work, we went to his room but we found his door was open. We went inside with the landlady and found him.'

Building owner Nattanit Hawharn, 31, said Puttawat stayed home alone and was usually silent in his room so she didn't think anything was wrong.

She said: ‘He was usually quiet and rested in his room or drank cans of beer after work. We saw his door was opened. We thought he was only sick.'

Investigating officer Police Captain Pongnarin Nontanok of Bang Phli police station said they found no traces of assault.

He said: ‘Puttawat Kamwan was still lying on his bed. His right arm was also touching the charging phone.

‘We found no trace of assault. From the evidence, he had been dead for at least three days. His corpse was bloated and sent foul stench across the room.

Pongnarin added that Puttawat might have been killed by short-circuiting as his arm was lying on the charging phone.

The policeman said: 'The initial investigation reports noted the presence of the phone and charging cable, so electrocution was suspected as the cause of death.

'This was confirmed with an autopsy at the Ramathibodi Chakri Naruebodindra Hospital in Bangkok.'